The Square D QMB364W SER E1 200A 200 AMP 3-POLE FUSIBLE PANELBOARD SWITCH see below is a sensor/switch from Square D. It senses object presence, distance, or position (or switches an electrical circuit) and converts that into an output signal for machine control or monitoring. Key specifications noted on this listing include 200A, 200 AMP. It is commonly in production lines requiring accurate detection or operator control.
